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Question 3 An investigator conducts a study to investigate whether there is a difference in means PEF in children with chronic bronchitis as compared to those without. Data on PEF are collected and summarized below. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Apply the two sample t test at alpha = 0.05. Group Number of children Mean PEF Std Dev PEF Chronic Bronchitis 25 281 68 No chronic bronchitis...

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